240v AC to 90(110)v DC Converter

Discussion in 'TV & Satellite' started by LazyRover, Jun 21, 2010.

  1. LazyRover

    LazyRover Read Only Funster

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    Googling around, I can find plenty 240v AC to 12v DC converters and 240v AC to 110v AC

    but not 240v AC to 90 or 110v DC converter.

    Does anyone know where I might find one?.

    Thanks.
     
  2. dazzer

    dazzer Read Only Funster

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    Blimey!!!

    What on earth do you need 100v DC for??? :Eeek:

    Ive never heard of such a thing or indeed anything needing that amount of power in DC form:Eeek:
     
  3. LazyRover

    LazyRover Read Only Funster

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    A friend has some very old value radios which he is trying to get working. Apparently they run at 90v DC.:Smile:
     
  4. pappajohn

    pappajohn Funster Life Member

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    eight 12v batteries end to end.

    90v sounds an awful lot of dc volts to run a valve radio to me.
     
  5. hilldweller

    hilldweller Funster Life Member

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    WOW - blast from the past. When I was a kid I had a portable radio with 90V and 1.5V batteries. 90V for the electronics and 1.5V for the heaters.

    Cost a fortune to run it.

    Google: tube radio battery substitute
    and he'll find the answer.

    One here: http://www.antiqueradio.org/bsupply.htm
     
  6. pappajohn

    pappajohn Funster Life Member

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    substituting the 110v ac components for those suitable for 230v ac of course (presumably ?)
     
  7. Wildman

    Wildman Read Only Funster

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    why not use a 240/110V Ac transformer then add a bridge rectifier and some smoothing caps you should get someplace close. might need to add another transformer to bring it down a bit or wind one to suit.
     
  8. 4b2

    4b2 Read Only Funster

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  9. LazyRover

    LazyRover Read Only Funster

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    Thanks everyone.

    I'll pass on the advice.:thumb:
     
  10. hilldweller

    hilldweller Funster Life Member

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    A tiny 230V transformer would be needed. Maybe as low as 60V secondary.

    It does need a bit of experimentation because a battery set would not have provision for any hum on the DC supply. Sure ain't rocket science.
     
  11. pappajohn

    pappajohn Funster Life Member

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    Tis to me Brian......i buy electronics ready made in a suitable box.
     
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